Growing Radishes With Grow Lights

Radishes add a delicious, peppery crunch as a salad vegetable or a garnish.
Radishes grow well (and quickly) under grow lights. They’re virtually as easy as a leafy-green but with the satisfaction of growing a tasty, colorful vegetable.

Radishes Light Requirements

Radish plants will thrive under lights that provide:

15

20

 DLI 

DLI (Daily Light Integral) is how we measure amounts of “plant-useful” light. Once we know a plant’s DLI needs we can match it to the ideal grow light setup.

Day Length for Radishes

Radish plants do best with a lights on for:

12

14

 hours 

Best Grow Lights for Radishes

It takes a moderately powerful light to provide 15-20 DLI in a 12 hour period. The Bright Grow recommendation is the GE PAR38 balanced grow bulb. Hang the bulb 14-16 inches above the plant’s leaves. This will give you a circle of light 8-9 inches across that’s just the right amount of bright.

Radishes, like other leafy plants, will thrive under a balanced full-spectrum light.

Balanced full-spectrum lights provide roughly equal amount of red and blue wavelengths while still appearing white to our eyes.

High Output fluorescent or LED grow lights will both work well for growing Radishes.

Temperature for Radishes

Radishes prefer cool temperatures. Some varieties can handle warmer days but they will do best in a cool room.

Growth: 

60

 – 

75

°F 

Size of Radish Plants

Radishes need at least 6 inches of soil depth to develop properly. You grow multiple plants in a large pot — give each seed about 2 inches of separation.
Typically grows 6

10

” tall

Does well in 8

12

” diameter containers

Radish Varieties

Pretty much any variety of radish should grow well indoors.
  • Cherriette
  • French Breakfast
  • Cherrybelle

Subscribe to our newsletter

Get exclusive guides to help your indoor garden thrive!